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.lnitrh tstcs g'utmt @ffice DANIEL c. coPPIN AND GILBER'I n. oLnMs-Ns, or CINCINNATI, OHIO.

Letters Pfllcnt No. (32,477, datcfl February 26, 1867.

IMPROVEMENT IN LOCK-UP SAFETY-VALVES.

TO ALL WHOM 1Tt MAY CONOERN:

Be it knoirnlthsit we, DANIEL G. Corrxs and GILuI-:nr H. CLEMENS, of Cincinnati, Hamilton county, State of Ohio, have invented certain new and useful Improvements in Steam Safety-Valves; and we do hereb`y declare the following to be a full, clear, and exact description thereof, reference beingl had to the accompanying drawings,l making part ol' this specification.

Figure 1 is a sectional view ol'our improved steam safety-valve, showing the workingv pnrts and their ntlrtchments in position, when at rest, and the course of' the steam as receivednudvdischarged throughthevcase; also the mode of securing the cap to body.

Figure 2 is n plan of case with cap removed, showing the relative positions ofthe Working parts, as before mentioned.

Figure 3 is an end' sectional view of the mechanism in part, showing vulvev tube, velve, graduating arms, lever, etc. A v v y Figure 4' is :in end View of lever, adjustable clamp, ahd'saddle, for thcrsvuspending of the weight.

Figure 5 is an inverted view of bottom of' vulve, showing v the position and form of the receiving and discharging ports of the steam. l i

I A represents the body of` case, provided at the periphery of top with a continuous raised lip or top projection i to i'orm seat for cap B, also base f'or a-rch guide E, While in the centre a -tube is erected,througli which the steam is directed to the valve seated upon thctop. The tube is connected at its lower extremity with a chamber, into which the steam is admitted through the peculiar-shaped openings e, which is more fully explained in fig. 5. Immediately above the chamber und around the tube is a similar chamber, provided with openings a' through which is conducted the escape stenm when blowing off. The body of' case is provided at the bottom 'with a flange of suitable dimensions for the securing' of the valve firmly to the boiler A', the bottom of said ange being provided with a series of-V-sl1aped rings,-ti1e object of which is to prevent the tota-l exclusion .of steam from the valve by evil-designed persons so disposed. B represents the cap, provided et the bottom with a continuous flange projecting inwards, and formed to fit inside the lip, as shown on the bodyof case. Upon the inside, and projecting from the flange, a. hook lug is formed, in dotted lines and marked J, to fit under the lip K on body of case, and marked as shown. Opposite to the lip is formed a lug, at l, into which the lock-bolt is secured against the removal'of the cap, unless the lock is taken from the bolt. C represents the levers, which are hinged to the arch guide E secured to body of case, and are supported by the steel points I secured to the graduating arms projecting from the valve stem D. A series of notches are provided atthe ends of the levers to indicate the pounds pressure required, which is regulated by the .moving of the saddles to the desired point D represents the valve, valve stem, and graduating arms combined, which are provided near each cud with t slotted opening, into which the steel points Ihre fitted so they can be shifted when required to produce l greater or less proportion of leverage. The top part of valve stem is in form a tube, through the sides ofwhich a pin is inserted to guide the slot in the headed bolt O, fitted into the stem-loosely, so that it may be raised orlowered at pleasure. E represents the arch guide, which is firmly secured to thelbody of case, and forms the fulcra for levers, ns also the top guide for valve stem. F represents the weight, in form ns shown, provided on the top, in proper positions, with T-lugs 'extending from the outer periphery of the weight towards its centre,- u. corresponding distance with the space of notches on face of levers. G represents the clamps, fittedto the T-lugs on weight, to admit of their boing moved to any desired position on same, and there secured by the setscrews, as shown. Hrepresents the saddles hinged to thelugs on clumps G, und formed V-shaped, near the top, upon inside, to fit thc notches on top of levers. I represents the steel points, in form as shown, und are fitted to the slots in graduating arms D, and secured inposition by a uut upon the opposite side of same. J represents the hook lug on cap, to secure it to the body of case. K represents the lip on body, to receive the hook lug on cap.- L represents the lockbolt, to secure the cap to body of` case by its being passed up through the body and screwed into a lug on cap for the purpose. NI represents the guard, to prevent the tampering with the valve from the top by its complete enclosure of the escape-steam openings. N represents the eye-bolt passed through the guard and screwed into the top of' bolt O to raise the valve when required. Orepresents a. piu with head large enough to prevent its dropping d owu on thc top of valve stem, and near the lower end a .slot for pin to pass through both it and the valve stem, which will admit the raising of the valve et pleasure, but will not .ellow its being loaded or tampered with.

l.Il 'ta Operation.

The valve, as represented, is et rest, :md is supposed to be set to :my given pressure of steam desired'.

The stoom as it rises will pal-ss through the openingsl e, in bottom of cese, in'to the tubnla-r ehamber A und under the valve D. When the pressure of steam under the valve bec-emes equal to the amount of resistance oiered by the weight suspended from the levers C, the valve will raise from its seat andl relieve ythe lboiler of any excess of pressure over the maximum allowed. The escape steam blowing into the case, and coming in contact with the top of 'the weight, willassist in reseating. the mlveby the steam exhausting downwards through the openingsvA near bottom of case, es is indicated by the arrows show-'iron the drawing. The case has relief by ,the escape steam passing through the openings A, iri top of eri-p, and out under the guard M, as shown. v

We claim herein ns new, and as our invention- )1. The arrangement of the bodyA und cepB of the enclosing eased'or the mechanism of the snfety-vnlve, with the tube A", valve D, port-s A A', series of V-rings, hook lug J, lng l, guard M, and eseope ports A" A, in' the manner and for the purposes set forth. I l' 2, The arrangement of ,the notched levers C C, valve und stemll) D, graduating arms D. D', with slots d d, steel points I I, guide Weight F, with T-lngs ff, saddles H clamps G G, slotted pin, und eye-bolt. N, in the manner ami for the purposes set forth. A

3. The arrangement of the V-slmpefl rings, with reference to openings A and chamber A".

4. The arrangement of the weight F, with reference to the vertical tubular chamber A and levers 0,. as herein setferthi 5. Tho construction of the arch guide E whereby to .guide the valve stem, in the manner and for the purposes set forth.

DANIEL' Gr. COPPIN,

-GILBERT H. (minimis.

Witnesses:

OcTAvIUs KNIGHT, EDWARD H. KNIGHT. 

